[I'm in the process of designing plans for a larger scale (roughly 39" span) F-35C. I will be using 6mm depron, and I will fiberglass the depron. The plans I am using are modified from au117's F-35 overall layout.

Should I avoid glassing the depron, and just use carbon fiber supports for strength? I know that would keep the weight down quite a bit, but I'm using an EDF with 1.7kg thrust and I don't want the plane to fall apart in the sky!

Download the free version of profili2, and you can print out any airfoil they have to see how it will look. When you choose a certain airfoil and go to print it, it will ask what size in length (mm) plug the numbers in and your all set to go. It really is very easy.

However, I'm really trying to minimize weight. Do I need an intake duct with this set up? The area transitioning from the entrance to the EDF will remain almost constant (d = 68mm, A = 3,216 mm^2) with the belly of the plane and the splitter.